Ce修饰Mn基活性炭纤维耦合低温等离子体降解苯  

Degradation of benzene by Ce-modified Mn-based activated carbon fiber coupled with non-thermal plasma

作　　者：戴仕伟 刁永发[1] 钟方川[2] 刘鑫[1] DAI Shiwei;DIAO Yongfa;ZHONG Fangchuan;LIU Xin(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;College of Science,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]东华大学理学院,上海201620

出　　处：《东华大学学报（自然科学版）》2022年第3期107-113,130,共8页Journal of Donghua University(Natural Science)

摘　　要：为了研究Ce修饰Mn基活性炭纤维(activated carbon fiber,ACF)耦合低温等离子体降解苯的效果,采用水浴加热法制备了5%Mn/ACF、5%Ce/ACF以及Mn-Ce(m∶1)/ACF负载型催化剂,其中,5%为Mn或Ce在ACF中的质量分数,m∶1为Mn与Ce的质量比,将制备的催化剂用于协同双层介质阻挡放电(double dielectric barrier discharge,DDBD)降解苯。结果表明:引入催化剂后,DDBD对苯的降解效率和CO_(3)选择性都得到了明显的提高,而O_(3)生成量显著下降;双金属催化剂的活性优于单金属催化剂,其中Mn-Ce(5∶1)/ACF对于DDBD降解苯的协同效果最佳;相比单独DDBD系统,在能量密度为373 J/L时,Mn-Ce(5∶1)/ACF协同DDBD系统对苯的降解效率和CO_(3)选择性分别提高22.3%和19.7%,而O_(3)的生成量则下降55.3%。所制备的Ce修饰Mn基催化剂在低温等离子体降解苯的研究中具有一定的适用性。In order to study the benzene degradation by non-thermal plasma coupled with Ce-modified Mn-based activated carbon fiber(ACF)catalysts,the 5%Mn/ACF,5%Ce/ACF and Mn-Ce(m∶1)/ACF catalysts were prepared by water bath heating method,where 5%is the mass ratio of Mn or Ce loaded on the ACF,m∶1 is the mass ratio of Mn and Ce.The prepared catalysts were applied for the degradation of benzene combined with double dielectric barrier discharge(DDBD)plasma.The results indicate that the degradation efficiency and CO_(3)selectivity are significantly enhanced with the introduction of catalysts,while the O_(3)production is dramatically reduced.The activities of the Ce-modified Mn-based catalysts are better than that of the two single metal catalysts,and the best cooperative performance is observed in Mn-Ce(5∶1)/ACF catalyst.Compared with the condition in only DDBD system,when the energy density is 373 J/L,the benzene degradation efficiency and CO_(3)selectivity are increased by 22.3%and 19.7%respectively,while the O_(3)production drops by 55.3%with the introduction of Mn-Ce(5∶1)/ACF catalyst.The prepared Ce-modified Mn-based catalysts have certain application significance in the study of benzene degradation by non-thermal plasma.

关 键 词：锰铈催化剂 活性炭纤维 双层介质阻挡放电 苯降解 

分 类 号：X511[环境科学与工程—环境工程]